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. 2026 Jan 4:e19110.
doi: 10.1002/advs.202519110. Online ahead of print.

Interlayer Dzyaloshinskii-Moriya Interaction in Synthetic Ferrimagnets for Spiking Neural Networks

Shen Li  1   2   3 , Xing Chen  4 , Mouad Fattouhi  5 , Tianxun Huang  6 , Chen Lv  3   6 , Mark C H de Jong  2 , Pingzhi Li  2 , Daoqian Zhu  3 , Xiaoyang Lin  1   3 , Felipe Garcia-Sanchez  5 , Eduardo Martinez  5 , Stéphane Mangin  6 , Bert Koopmans  2 , Weisheng Zhao  1   3 , Reinoud Lavrijsen  2
Affiliations

Interlayer Dzyaloshinskii-Moriya Interaction in Synthetic Ferrimagnets for Spiking Neural Networks

Shen Li et al. Adv Sci (Weinh). .

Abstract

Interlayer Dzyaloshinskii-Moriya interaction (IL-DMI) in synthetic magnetic structures has attracted extensive interest for greatly facilitating deterministic spin-orbit torque (SOT)-driven information writing and topologically non-trivial 3D magnetic Hopfion forming. However, its distinct role in synthetic ferrimagnets (SFi) remains unexplored, where the conjunction of asymmetric magnetic moments and antisymmetric nature of IL-DMI leads to more diverse spin configurations and applications. Here, we reveal the unidirectional and chiral nature of IL-DMI in SFi, further unlocking application directions of IL-DMI in neuromorphic computing. Particularly, the IL-DMI-induced effective field increases approximately twentyfold while interacting with two asymmetric antiparallel-aligned moments, greatly facilitating future IL-DMI detection. Unlike previous digital-like switching, we find that the interplay of IL-DMI, SOT, and thermal effect gives rise to an analog-like switching behavior. Leveraging this, we develop an SOT-based non-probabilistic leaky-integrate-fire neuron device utilizing the micromagnetic analog-like switching model. Compared to probabilistic neurons, this provides a hardware support Spiking neural network, interlayer Dzyaloshinskii-Moriya interaction, spin-orbit torque, synthetic ferrimagnetsfor ultralow power, high-sparsity, and high-accuracy spiking neural networks.

Keywords: interlayer Dzyaloshinskii–Moriya interaction; spiking neural network; spin‐orbit torque; synthetic ferrimagnets.

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